docs: def console_set_background_flag(con: tcod.console.Console, flag: int) -> None:
      """Change the default blend mode for this console.
  
      Args:
          con (Console): Any Console instance.
          flag (int): Blend mode to use by default.
  
      .. deprecated:: 8.5
          Set :any:`Console.default_bg_blend` instead.
      """
      lib.TCOD_console_set_background_flag(_console(con), flag)